The original symptom was very low throughput, which is what prompted the investigation . Without tcpdump, low throughput and high reordering, with tcpdump, high throughput ( which is why I couldn't figure out what was going on).
I'd be very interested if someone with kernel experience could tell me what's specific about tcpdump.
The original symptom was very low throughput, which is what prompted the investigation . Without tcpdump, low throughput and high reordering, with tcpdump, high throughput ( which is why I couldn't figure out what was going on).
I'd be very interested if someone with kernel experience could tell me what's specific about tcpdump.